It shows the D3 has been out selling Canon's 1D Mk III
and
1Ds Mk III combined before D3X was available, and since the D3X introduction Nikon has been getting 70-80% market share in the professional market.

There is a note saying the data is from Nikon's own survey data. When being asked about the source the data later on in Q&A session, Nikon officials claim the data is compiled by Nikon based on third party data.